For most of us, song is something that permeates our lives on a daily basis. We find it on the radio, in concerts, in ads, and from music services. But song has much deeper roots than the modern commercial age. We humans have been singing for as long as we've been living on this planet—and so have the birds, the wolves, and the wind. They still are, if we listen. Earth Song, a podcast I helped produce for the Idaho Mythweaver's Voices of the Wild Earth series, is an invitation into this vast world of song in nature.